Bacharach PCA 2 24-9448 - Manual (Page 42)

Instruction 24-9448 4-8
Operation
b. Dsconnect any hoses connected to the
+∆P and –∆P ports, and then press ENT
to zero the pressure sensor.
c. Reconnect any hoses. When measurng
draft, simply leave the –∆P port open to
the atmosphere and connect the probe’s
draft hose to the +∆P port (see Fgure 3-2
on Page 3-3).
5. Do one of the followng to measure draft or
dfferental pressure:
• To measure draft, smply nsert the probe
nto the stack and observe the draft read-
ng on the PRESSURE screen.
• To measure dfferental pressure, connect
two samplng hoses to the +∆P and –∆P
ports, and place the open end of each hose
nto the areas beng measured. The df-
ferental pressure between the two areas s
now dsplayed on the PRESSURE screen.
If the pressure at the +∆P port s hgher than the –∆P port, then the
pressure readng wll be positive. If t s lower, then the readng wll be
negative.
4.7 Saving Test Data
Up to 500 ndvdual sets (“snap shots”) of combuston-test or pressure
data can be saved n memory, whch can later be recalled for vewng from
the Memory Drectory (Secton 4.13.1).
1. Frst dsplay the screen that contans the
data to be saved. In the example to the rght,
all data assocated wth the Combuston Test
RUN screen wll be saved.
2. Press the SAVE (F3) button to save the test
data n the next avalable memory locaton.
NOTE: When memory is full, the next reading
saved will overwrite the oldest reading.
PRESSURE ZERO
Disconnect hose then
press ENTER
PRINT ZERO SAVE
F1 F2 F3
PRESSURE ZERO
Reconnect hose
PRINT ZERO SAVE
F1 F2 F3
RUN NATURAL GAS
O
2
4.0 %
CO 12 ppm
EFF 82.6 %
CO
2
9.5 %
T-STK 374 °F
T-AIR 68.0 °F
EA
21.3 %
CO(3) 13 ppm
PRINT MENU SAVE
F1 F2 F3